CVE-2026-61741Critical· 9.3▾ Midnighthttp4s-scala-xml provides `EntityDecoder[F, scala.xml.Elem]` instances that parse XML message bodies. Prior to versions 0.24.1 and 1.0.0-M39, these decoders used a `javax.xml.parsers.SAXParserFactory` obtained from `SAXParserFactory.newI…
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 51.2 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Sep 26.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.3%
Last analysed / modified upstream
http4s-scala-xml provides EntityDecoder[F, scala.xml.Elem] instances that parse XML message bodies. Prior to versions 0.24.1 and 1.0.0-M39, these decoders used a javax.xml.parsers.SAXParserFactory obtained from SAXParserFactory.newInstance without any security configuration. With the JDK's default settings, the parser resolves DOCTYPE declarations, external general and parameter entities, and external DTDs.An application that uses these decoders to parse untrusted XML is vulnerable to XML External Entity (XXE) attacks. An attacker can craft a request that discloses local files readable by the service process, performs server-side request forgery (SSRF) against internal network resources, and/or causes denial of service through entity expansion. Versions 0.24.1 and 1.0.0-M39 fix the issue.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
org.http4s:http4s-scala-xml_2.12 <= 0.24.0org.http4s:http4s-scala-xml_2.13 <= 0.24.0org.http4s:http4s-scala-xml_2.13 >= 1.0.0-M1, <= 1.0.0-M38.1org.http4s:http4s-scala-xml_3 <= 0.24.0org.http4s:http4s-scala-xml_3 >= 1.0.0-M1, <= 1.0.0-M38.1Patched in:
org.http4s:http4s-scala-xml_2.12 0.24.1org.http4s:http4s-scala-xml_2.13 0.24.1org.http4s:http4s-scala-xml_2.13 1.0.0-M39org.http4s:http4s-scala-xml_3 0.24.1org.http4s:http4s-scala-xml_3 1.0.0-M39Connected by shared product, vendor, weakness, or advisory.
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